package com.atguigu.springcloud.alibaba.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.atguigu.springcloud.alibaba.service.PaymentService;
import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

@RestController
public class CircleBreakerController {

    private Logger logger = LoggerFactory.getLogger(CircleBreakerController.class);

    private static final String SERVER_URL = "http://nacos-payment-provider";

    @Resource
    private RestTemplate restTemplate;

    @Resource
    private PaymentService paymentService;

    @GetMapping("/consumer/fallback/{id}")
//    @SentinelResource(value = "fallback")//没有配置
//    @SentinelResource(value = "fallback" ,fallback = "handlerFallback")//fallback只负责业务异常
//    @SentinelResource(value = "fallback", blockHandler = "blockHandler")//blockHandler 只负责 sentinel 控制台配置违规异常
    @SentinelResource(value = "fallback" ,fallback = "handlerFallback",blockHandler = "blockHandler")
    public CommonResult<Payment> fallback(@PathVariable("id") Long id) {
        CommonResult<Payment> result = restTemplate.getForObject(SERVER_URL + "/paymentSQL/" + id, CommonResult.class, id);
        if (id == 4) {
            throw new IllegalArgumentException("IllegalArgumentException ,非法参数");
        } else if (result.getData() == null) {
            throw new NullPointerException("NullPointerException ,该 ID 没有对应记录，空指针异常");
        }
        return result;
    }

    // fallback
    public CommonResult<Payment> handlerFallback(@PathVariable("id") Long id,Throwable e) {
        Payment payment = new Payment(id,"null");
        return new CommonResult(444,"兜底异常 handlerFallback,exception 内容 " + e.getMessage(),payment);
    }

    //blockHandler
    public CommonResult<Payment> blockHandler(@PathVariable Long id, BlockException blockException) {
        Payment payment = new Payment(id, "null");
        return new CommonResult(444, "blockHandler-sentinel 限流，无此流水,blockException：" + blockException.getMessage(), payment);
    }


    // =============openFeign

    @GetMapping("/consumer/paymentSQL/{id}")
    public CommonResult<Payment> paymentSQL(@PathVariable("id")Long id){

        return paymentService.paymentSQL(id);
    }
}
